package com.hjl.util;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;

public class MyBatisUtil{

    private static SqlSessionFactory factory;

    static {        //在静态代码块下，factory 只会被创建一次
        try {
            InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
            factory = new SqlSessionFactoryBuilder().build(is);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 创建SqlSession 对象和关闭 SqlSession
     */
    public static SqlSession createSqlSession(){
        return factory.openSession(false);
    }

    public static void closeSqlSession(SqlSession sqlSession) {
        if (null != sqlSession) {
            sqlSession.close();
        }
    }

}